Background
Nowadays, we can see more and more electric vehicles in the streets than we used to do. Electric cars have many obvious advantages comparing to gasoline cars. For instance, Tesla, as one of the largest electric vehicle manufacturer, has earned a reputation from customers. It is also important to know that all the models that Tesla has sold were electric vehicles. This means that electric vehicle business has started to get prosper.
By this notion, I would like to check the distribution of electric vehicle charging station to get a better understanding on how convenient it would be for electric vehicle owner to recharge.